Issue #5479 : added volume of Frustum Cone function in src/main/java/com/thealgorithms/maths/Volume.java and assert function for the same in src/test/java/com/thealgorithms/maths/Volume.java

[ShreeHarish]

…n in test folder under math/Volume

• [x ] I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.29%. Comparing base (1e8abf1) to head (6cb953b).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5483   +/-   ##
=========================================
  Coverage     52.29%   52.29%           
- Complexity     3256     3257    +1     
=========================================
  Files           525      525           
  Lines         15184    15185    +1     
  Branches       2887     2887           
=========================================
+ Hits           7940     7941    +1     
  Misses         6920     6920           
  Partials        324      324           

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[ShreeHarish]

This is my first PR. Kindly guide me through, had I missed something.